* {
    padding: 0;
    margin: 0;
}
body{
    background-color: black;
}
a{
   text-decoration: none; 
}
.page {
    position: absolute;
    top: 0;
    right: 0;
    left: 0;
    right: 0;
    overflow-y: scroll;
    /* -webkit 前缀 兼容 chrome 且webkit 老的手机不支持
        滚动起来如丝般顺滑
    */
    /* 支持手机端滚动 */
    -webkit-overflow-scrolling: touch;
    z-index: 1;
}
.page__hd{
    padding: 40px;
}
.page__title{
    font-size: 20px;
    text-align: left;
    font-weight: 400;
    color: #fff;
}
.page__desc{
    margin-top: 4px;
    color: rgba(255, 255, 255, 0.5);
}
.page__bd{
    padding: 0;
}
